Parts Camp 2-Pack 21" Lawn Mower Blades Replaces 134149 138971 532134149 532138971 for Husqvarna LTH2042 2042LS Craftsman YT3000 Poulan AYP – Fits 42" Deck Riding Mowers, 5-Point Star

What It Is

This is a 2-pack of 21-inch replacement blades for 42-inch deck riding mowers, designed for mulching or bagging grass on lawn tractors. They replace OEM part numbers 134149, 138971, 532134149, and 532138971.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 42 inches (measured blade tip to blade tip). These blades fit Husqvarna LTH2042, 2042LS, Craftsman YT3000, and many Poulan/AYP models with a 5-point star center hole. Measure your current blade length (from center hole to tip) – it must be 21 inches. Also check blade thickness (typically 0.25 inch) and offset (usually 0.75 inch). Verify your spindle has a 5-point star pattern; some AYP spindles use a 7-point star.

Key Things to Buy

• Quality: Aftermarket blades; may not be as durable as OEM. Good for occasional use, but heavy-duty mowing may dull them faster.
• Installation: Simple – remove the center bolt, swap blades, and torque to 30-50 ft-lbs. Use a blade removal tool or block of wood to prevent spinning.
• Common gotchas: These blades are sharp on both edges; handle with gloves. Ensure you’re not mixing with 20.5-inch blades (common on some 42-inch decks). Always sharpen before first use if you want optimal cut.
• Balance: Check blade balance after mounting – an unbalanced blade can cause vibration and damage spindles.

Should You Buy It

Buy these if you need an affordable, quick replacement for a 42-inch deck Husqvarna, Craftsman, or Poulan mower and don’t mind aftermarket quality. Avoid if you mow heavy, wet grass often or want OEM durability for frequent commercial use.